JPH0518717U - Lower piece support device for plate folding machine - Google Patents

Abstract

(57) [Summary] [Purpose] When the ends of the tin plate are waste-folded, the labor required to replace the lower piece and to insert and remove the spring is saved. [Structure] The upper surface has a groove 4 for bending the end of the workpiece 9, and the front lower surface presses the upper surface of the lower piece support 2 to crush the end of the workpiece 9. The lower part of the lower piece 1 having the above is fitted into the fitting groove 3 of the lower piece receiving base 2. The bottom of the lower piece 1 is supported by the rod 7 of the air cylinder 6 in which the air pressure is set so that the lower piece 1 can be lowered by the lower pressure of the upper piece 8.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a device for supporting a lower piece of a plate folding machine that bends thin plates such as tin plates and galvanized iron plates.

[0002]

[Prior Art]

 Conventional bending of thin plates such as tin plate and galvanized iron plate involves bending so that the middle part of the plate body is bent at a specific angle or the ends are folded back. When bending at a specific angle, the lower piece is fixed to the lower piece pedestal of the plate bending machine, and the plate body is clamped and bent by the upper piece that can be raised and lowered. In the case of waste folding, the lower piece is supported by the lower piece pedestal in a floating state, first bent in a V-shape by the upper piece, and then the pressing portion of the floating lower piece is used. The V-shape is folded back and crushed by the lower piece that is pressed down by the upper piece.

Therefore, since the support state of the lower piece is different between bending at a specific angle and waste folding, when performing waste folding processing, the bottom piece fixedly installed in the fitting groove of the pedestal is taken out and floated. Insert a leaf spring for insertion into the insertion groove, insert the lower piece on it, and start the processing work.When bending at a specific angle again, the leaf spring will be removed. Also needs to attach and detach the lower piece. As another method, a lower piece having a concave groove on the upper surface for bending the end of the workpiece in a V shape and a pressing portion on the front surface for crushing the end bent in the V shape. The lower part was fitted in the fitting groove of the lower piece pedestal, and the spring was set in and out automatically in the fitting groove of the lower piece pedestal.

[0004]

[Problems to be solved by the device]

 As described above, since the supporting condition of the lower piece is different between the bending at a specific angle and the processing of the waste fold, the lower piece must be attached and detached at the same time for attaching and detaching the leaf spring, which is a means for preparation and danger. Along with this, the work efficiency has fallen. In addition, in the case where the spring is installed in the fitting groove of the lower piece pedestal so that it can freely move in and out, it is not necessary to attach and detach the lower piece, but it takes time to insert and remove the spring, and the spring itself needs to be replaced. It is complicated.

In view of the above points, the present invention is to provide a lower piece supporting device for a plate bending machine that requires no trouble and can easily perform any bending.

[0006]

[Means for Solving the Problems]

 In order to solve the above problems, the present invention has a lower part fitted in a fitting groove 3 of a lower piece pedestal 2, a concave groove 4 for bending an end of a work piece 9 on an upper surface, and a lower groove on a front lower surface. The bottom of the lower piece 1 having a pressing portion 5 that presses against the upper surface of the piece receiving base 2 and crushes the end of the workpiece 9 is supported by the air cylinder 6.

[0007]

[Action]

 To explain the operation of the lower piece supporting device of the present invention, when the end portion of the work piece 9 is V-shaped at the time of waste folding, the pressing portion 5 of the lower piece 1 and the upper surface of the lower piece pedestal 2 are V-shaped. The lower part of the lower piece 1 is fitted into the fitting groove 3 at an interval such that the end of the work piece 9 bent in the direction is inserted, and the lower part is supported by the rod 7 of the air cylinder 6. When a portion near the lower piece 1 is placed on the concave groove 4 and the upper piece 8 is lowered from above the lower piece 1 into the concave groove 4, the pressing portion 5 of the lower piece 1 comes into contact with the upper surface of the lower piece pedestal 2. The lower piece is lowered to, and in the lowered state, the end of the workpiece 9 is bent into a V shape. When the upper piece 8 is lifted after finishing the V-shaped machining, the rod 7 of the lower piece 1 is extended by the air pressure of the air cylinder 6 and is raised again.

Next, the end portion of the V-shaped workpiece 9 is inserted into the gap provided between the pressing portion 5 of the lower piece 1 and the upper surface of the lower piece pedestal 2, and the upper piece 8 is recessed. 4, the lower piece 1 is lowered by the pressing force of the upper piece 8 against the rod 7 of the air cylinder 6, and the pressing portion 5 crushes the end of the workpiece 9 bent in a V shape. The waste fold is finished. When the upper piece 8 is lifted after the waste folding, the lower piece 1 pushes up the lower piece 1 by extending the rod 7 again to the original position by the preset air pressure of the air cylinder 6. ..

On the other hand, at the time of bending at a specific angle, the pressing portion 5 of the lower piece 1 comes into contact with the upper surface of the lower end pedestal 2 and contracts the rod 7 of the air cylinder 6 so as to be fixedly fitted into the concave groove 4. And supports the lower piece 1.

[0010]

【Example】

 An embodiment of the lower piece supporting device of the present invention will be described below with reference to the drawings. FIG. 1 is a sectional view of the device of the present invention and FIG.

In the figure, A is a plate bending machine main body, 1 is a lower piece having a lower part fitted in a fitting groove 3 of a lower piece cradle 2 provided in the front side lateral direction of the main body A, and the lower piece On the upper surface of the groove 1, a groove 4 whose upper portion is widened upward is provided in the lateral direction. A pressing portion 5 is formed laterally on the lower surface of the front portion of the lower piece 1.

Reference numeral 6 denotes an air cylinder provided at a lower portion of the lower piece support base 2, and a rod 7 of the air cylinder 6 is inserted into the fitting groove 3 from below to support the lower piece 1. The air pressure of the air cylinder 6 that supports the lower piece 1 is preset so that the lower piece 1 can be lowered when the lower piece 1 is pushed by the upper piece 8 installed above the lower piece 1. .. Reference numeral 9 in the figure denotes a thin plate-shaped workpiece such as a tin plate or galvanized iron plate.

[0013]

[Effect of the device]

 Since the lower piece moves up and down by the expansion and contraction of the rod of the air cylinder and can be supported in any state, the lower piece can be positioned for bending at a specific angle or for waste folding without removing the lower piece itself. Therefore, it is possible to save the trouble of putting the lower piece and the spring into and out of the fitting groove, and the working efficiency can be remarkably improved, which is a useful idea.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing an embodiment of a lower piece supporting device of the present invention.

FIG. 2 is a side view of a plate folding machine equipped with a lower piece supporting device of the present invention.

[Explanation of symbols]

 A Plate bending machine body 1 Lower piece 2 Lower piece pedestal 3 Fitting groove 4 Recessed groove 5 Pressing part 6 Air cylinder

Claims (1)

[Scope of utility model registration request] 1. A lower part is fitted into a fitting groove 3 of a lower piece pedestal 2 and has an upper surface provided with a concave groove 4 for bending an end portion of a workpiece 9.
The bottom of the lower piece 1 having a pressing portion 5 that presses the upper surface of the lower piece receiving base 2 on the lower surface of the front portion and crushes the end of the workpiece 9 is supported by the air cylinder 6. Lower frame support device for plate bending machine.